Hello, I came here because I have the same issue with the radio/satnav in my car, a Nissan Connect unit, as it seems it uses the very same copy protection mechanisms on the SD card as the Seat's.
I thought you guys might like to know there's been a report that the licensing system has been cracked:
http : // gpsunderground . com /forum/renault-nissan-infiniti/4051-nissan-qashqai-connect-12.html
"cryptnav system has been cracked.. for ford, nissan, opel, skoda, etc...
sd_meta.dat calculate source:
-SD card CID register,
-Constans (40bytes public key+20 bytes(PRKey, (5B71E6266F6D5F2890049ED896AF1147BDDB7080C28A5289A 1FB2DAE.................)
-decrypted nav_root.dat file.....
NOT FREE!!!!!
waiting for public version......."
Unfortunately, I've not been able to find anything more about this. Meanwhile, you guys have had some very interesting discussions about your copy protection problems.
The protection scheme on our Nissan Connect head units seems identical in that the card id (CID) is the key to the protection... it's referenced by some binary licence-type files on the card, which makes copying the card pointless: no matter whether you do a sector copy of the card to a fresh one or a file copy, the new card will have a different ID.
The Connect units only have a single SD card, which is 8GB, and contains maps, POIs, speech files and updates for the radio/satnav. If you borrow and put a newer card in, the radio firmware updates. If you put back your old card, it will downgrade!
It seems we can only get updates for it in the form of physical SD cards bought from navigation.com for about 150 euros!! There are Ebay sellers offering cards for half that, and I am suspicious that if the copy protection was cracked then these people are part of that circle.
Another possibility is that it might be possible to change the CID of a card. I too found the referenced web page, but I couldn't find any evidence of it being possible to buy cards whose CID was changeable :-(
I also looked for an SD card emulator, which would be a hardware device that plugged into the SD slot which would look like an SD card but you could program to have the CID of any SD card etc.. couldn't find anything :-(
Now, you may be saying that this is nothing new. What has particularly struck my interest is the discussion about your MapCare option. It seems to me that the program can download new maps onto the card and generate a licence key for the map; it must read the CID, check any update rights you've bought and then write the licence files to the card. The licence files match the CID, and the radio will accept them.
If the authors of the copy protection system have been lazy, then just possibly the updater program might be fooled into thinking you have the right to a map update and generate the licence key for you.
Or, generate multiple licence keys for different cards, so you get a bunch of blank cards, copy the files onto them without the keys, and then somehow get the program to generate appropriate keys using up just the one entitlement update.
Another idea is that there may be variants of the head units which don't check the CID, specifically created to make free map updates possible. Is it possible to flash this "libertarian" firmware onto the restrictive Seat unit?
Just my 2p worth. I hope I've contributed to the discussion. sorry for going on so long.
Paul
p.s. I had to mangle the URL because I'm a n00b here.